Durable fiberglass frame and ribs and a jumbo 46-inch arc canopy, this compactumbrella performs like a pro, the vented canopy is engineered to resist harshwinds and the auto open and close function is convenient WindPro ventedumbrellas by ShedRain. Elegance with function. A serious umbrella when facingwindy conditions! The WindPro system is wind-tunnel tested to resist highwinds without inversion and is top rated in the industry.